Version 2.0 Copyright © AQA and its licensors. All rights reserved. C1.6.1 Vegetable Oils.

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Presentation transcript:

Version 2.0 Copyright © AQA and its licensors. All rights reserved. C1.6.1 Vegetable Oils

Using Exam pro items to support successful outcomes Version 2.0 Copyright © AQA and its licensors. All rights reserved. Learners will be able to test their progress against learning outcomes using questions from past AQA GCSE examinations

Foundation Tier C1 June 12, 5 Version 2.0 Copyright © AQA and its licensors. All rights reserved.

Mark Scheme - Foundation Version 2.0 Copyright © AQA and its licensors. All rights reserved. QAnswerExtra InformationMark (a)(i) Olive oil does not dissolve in water 1 (a)(ii) (the mustard is) an emulsifierAccept an emulsion has been formed 1 (b)(i) Double 1 (b)(ii) Add bromine water- turns colourless 1 (c)(i) Because the (olive) trees/plants/crops/leaves/fruit absorb/use carbon dioxide Allow carbon for carbon dioxide Allow carbon dioxide is used in photosynthesis 1 (c)(ii) Any one from Olive oil is a food Olives are slow growing Olives require a lot of land Not enough olive trees/oil Olive oil dense/viscous/high boiling point Ignore habitats Ignore gives off carbon dioxide 1

Higher C1 June 12, 6 Version 2.0 Copyright © AQA and its licensors. All rights reserved.

Mark Scheme - Higher Version 2.0 Copyright © AQA and its licensors. All rights reserved. QAnswerExtra InformationMark (a)(i ) Olive oil does not dissolve in waterAccept olive oil and water are immiscible Allow there is no emulsifier Ignore mustard Ignore do not mix/different densities 1 (a)(i i) (the mustard is) an emulsifier or an emulsion forms or a suspension of oil in vinegar/.water forms or visa versa The molecules have a ‘head’/hydrophilic end which dissolves in/attracted to oil accept because an emulsifier is added Accept diagram drawn showing this (b) Test Add bromine water Result turns colourless Allow iodine (solution) Allow orange colour disappears/decolourises Ignore clear 1111 (c) (olive oil is reacted with) hydrogen using a nickel catalyst (at a temperature of about 60 o C Accept hydrogenated Allow oC Ignore hot/heat Total 9